import assert from 'node:assert/strict';
import { describe, it } from 'node:test';
import { padIdFromUrl } from '../src/core/etherpad.ts';

const BASE = 'https://schulcloud.example.org';

describe('padIdFromUrl', () => {
	it('takes the pad id out of the url the server hands back', () => {
		assert.equal(padIdFromUrl(`${BASE}/etherpad/p/g.abc123$65f0e1d2c3b4a5968778695a`, BASE), 'g.abc123$65f0e1d2c3b4a5968778695a');
	});

	it('keeps the id exactly as encoded', () => {
		// Group pad ids contain `$`. Decoding or re-encoding the segment produces
		// an id Etherpad does not recognise.
		assert.equal(padIdFromUrl(`${BASE}/etherpad/p/g.x%24y`, BASE), 'g.x%24y');
	});

	it('refuses a url pointing at another host', () => {
		// The caller sends an Etherpad session cookie to whatever this returns, and
		// the url comes from server configuration — so a mismatch must not be
		// followed rather than trusted.
		assert.equal(padIdFromUrl('https://evil.test/etherpad/p/g.abc$123', BASE), undefined);
	});

	it('accepts a differing port only when it matches', () => {
		assert.equal(padIdFromUrl('http://localhost:4400/etherpad/p/pad1', 'http://localhost:4400'), 'pad1');
		assert.equal(padIdFromUrl('http://localhost:9001/etherpad/p/pad1', 'http://localhost:4400'), undefined);
	});

	it('gives up on a url that is not a pad url', () => {
		assert.equal(padIdFromUrl(`${BASE}/dashboard`, BASE), undefined);
		assert.equal(padIdFromUrl(`${BASE}/etherpad/p/`, BASE), undefined);
	});

	it('gives up rather than throwing on something that is not a url', () => {
		assert.equal(padIdFromUrl('not a url', BASE), undefined);
		assert.equal(padIdFromUrl('', BASE), undefined);
	});
});